Function simplicity_copyBits

src/simplicity/frame.c:263–267

Given a write frame and a read frame, copy 'n' cells from after the read frame's cursor to after the write frame's cursor, * and then advance the write frame's cursor by 'n'. * Cells in front of the '*dst's cursor's final position may be overwritten. * * Precondition: '*dst' is a valid write frame for 'n' more cells; * '*src' is a valid read frame for 'n' more cells; */

 *               '*src' is a valid read frame for 'n' more cells;
 */
void simplicity_copyBits(frameItem* dst, const frameItem* src, size_t n) {
  if (0 == n) return;
  copyBitsHelper(dst, src, n);
  dst->offset -= n;
}